A hospital's requirements for remote third-party monitoring of the HVAC system include the following: - The vendor must be able to continuously monitor system health and respond accordingly. - The…

Deploying an RDP jump box offers remote access but typically provides interactive control over a server, which may be broader than 'only network access' and doesn't inherently restrict access to only the vendor.

Installing a vendor's monitoring appliance on the internal network introduces an internal asset, potentially expanding the attack surface, and outbound SSL does not provide the same level of dedicated, restricted access as a VPN.

Creating a site-to-site VPN tunnel provides a secure, encrypted connection directly between the hospital's network and the vendor's network. This ensures the vendor is the sole entity accessing the HVAC system network-wise and allows for granular access control to restrict connectivity specifically to the HVAC system, meeting all stated requirements.

Implementing a reverse web proxy typically exposes a web application to the internet, which is generally less secure and harder to precisely restrict to 'only the vendor' and 'only network access to the HVAC system' compared to a VPN tunnel.